Félix Vallotton: Painter of Disquiet is the subject of a major exhibition at the Royal Academy of Art. This curious artist was Swiss by birth and Parisian by nature; he evolved from a precise, conventional painter into a witty and original observer of his adopted city’s life, paying special attention to the naughtiness of the 5.00pm assignations between men and their mistresses and capturing the hurly burly of human life in a series of fabulous, spare, black and white wood blocks which made his name.